Supercharger Vehicles
| Item Number | Description |
|---|---|
| 1 | Rear muffler |
| 2 | Mounting rubber |
| 3 | Exhaust valve |
| 4 | Outlet pipes |
| 5 | Finishers |
| 6 | Exhaust valve |
| 7 | Mounting rubber |
| 8 | Inlet pipe |
| 9 | Center to rear section joint clamps |
| 10 | Mounting rubber |
The rear section has two inlet pipes and four outlet pipes welded to a muffler. A stiffener plate is welded between each pair of outlet pipes. A polished stainless steel finisher is installed on each of the outlet pipes. Three suspension rubbers connect hangers on the muffler to hangers and a bracket on the underside of the body.
The muffler consists of upper and lower shells, which contain perforated inlet and inner pipes supported in five baffle plates. An exhaust valve is installed in the outboard outlet pipe on each side of the muffler. The exhaust valves are part of the active exhaust system.
Active Exhaust System
| Item Number | Description |
|---|---|
| 1 | Bracket and isolator mounts |
| 2 | Vacuum pump |
| 3 | Solenoid valve |
| 4 | LH exhaust valve |
| 5 | Pipe |
| 6 | Pipe carrier |
| 7 | RH exhaust valve |
| 8 | Reservoir |
| 9 | Restrictor |
| 10 | Check valve |
The active exhaust system allows exhaust gases to bypass the muffler to produce a more sporty exhaust sound. In addition to the exhaust valves, the active exhaust system has:
- A vacuum pump
- A solenoid valve
- A reservoir
- Related pipes, which incorporate a restrictor and a check valve.
Each exhaust valve consists of a normally open plate valve and pneumatic actuator.
The vacuum pump, solenoid valve and reservoir are attached to a bracket installed in the left rear wheel housing, behind the wheel arch liner. Plastic pipes are connected between the vacuum pump, reservoir and solenoid valve, and between the solenoid valve and the two exhaust valves. The pipes to the right-hand (RH) exhaust valve are located in pipe carriers attached to the rear floor brace.
In the pipes between the solenoid valve and the exhaust valves, a restrictor is installed in parallel with a check valve. The restrictor slows the flow of air through the pipes, to damp the opening of the exhaust valves. The check valve ensures air flows only through the restrictor when the exhaust valves are opened, but allows the restrictor to be by-passed when the exhaust valves are closed, to give an undamped closing movement.
The solenoid valve controls the operation of the exhaust valves by connecting them to the reservoir and vacuum pump or to atmosphere. Atmospheric pressure enters the solenoid valve through a filter attached to a vent.
Operation of the active exhaust system is controlled by the engine control module (ECM).